# subject (entity)

a thing that a change process is about in an event

- Computed level: L5 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: everyday  ·  Arena: subject

## Emergence
**Emerges from:** [entities](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-entities.object), [change](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-change.process), [event](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-event.occurrence), [process](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-process.general)

**Through:** the entity and the change process together are about in an event

**Novel properties:**
- focus of change
- role in event
- participant in process

## Examples
- The International Space Station adjusted its orbit in 2023 to avoid a fragment from a Russian anti-satellite test. *(engineering)*
- In 2011, a single trader's error at Knight Capital caused a $440 million loss in 45 minutes. *(economics)*
- The 2020 eruption of Taal Volcano displaced 50,000 people and altered regional air traffic. *(geology)*

## Used by
- [article](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-article.written) (L9)
- [experience](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-experience.cognitive) (L12)
- [self-model](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-self-model.reflexive) (L14)
- [topic](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-topic.subject) (L8)

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-subject.entity*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-subject.entity.json*  
*Every definition provably resolves to space, time, energy and pattern.*